在mgr1上安装ceph-mds服务，可以和其他服务器混用（如ceph-mon、ceph-mgr）
root@mgr1:~# apt-cache madison ceph-mds
root@mgr1:~# apt install ceph-md=16.2.10-1bionic把mgr1主机加进来创建成mds服务
cephadmin@deploy:~$ ceph-deploy mds create mgr1验证MDS服务
MDS服务目前还无法正常使用，需要为MDS创建存储池用于保存MDS的数据
up:standby当前为备用状态，需要分配pool才可以使用
cephadmin@deploy:~$ ceph mds stat
1 up:standby创建CephFs metadata和data存储池
cephadmin@deploy:~$ ceph osd pool create cephfs-metadata 32 32
pool 'cephfs-metadata' created
cephadmin@deploy:~$ ceph osd pool create cephfs-data 64 64
pool 'cephfs-data' created
cephadmin@deploy:~$ ceph -s
cluster:
id: dc883878-2675-4786-b000-ae9b68ab3098
health: HEALTH_OK
services:
mon: 3 daemons, quorum mon1,mon2,mon3 (age 3h)
mgr: mgr1(active, since 3h), standbys: mgr2
osd: 12 osds: 12 up (since 3h), 12 in (since 3h)
rgw: 1 daemon active (1 hosts, 1 zones)
data:
pools: 9 pools, 297 pgs
objects: 206 objects, 10 MiB
usage: 273 MiB used, 600 GiB / 600 GiB avail
pgs: 7.744% pgs not active
274 active+clean
23 creating+peering
io:
client: 5.3 KiB/s wr, 0 op/s rd, 0 op/s wr创建CephFS并验证
cephadmin@deploy:~$ ceph fs new mycephfs cephfs-metadata cephfs-data
new fs with metadata pool 8 and data pool 9这样状态就都是活跃的了
cephadmin@deploy:~$ ceph mds stat
mycephfs:1 {0=mgr1=up:active}
cephadmin@deploy:~$ ceph fs status mycephfs
mycephfs - 0 clients
========
RANK STATE MDS ACTIVITY DNS INOS DIRS CAPS
0 active mgr1 Reqs: 0 /s 10 13 12 0
POOL TYPE USED AVAIL
cephfs-metadata metadata 96.0k 189G
cephfs-data data 0 189G
MDS version: ceph version 16.2.10 (45fa1a083152e41a408d15505f594ec5f1b4fe17) pacific (stable)
cephadmin@deploy:~$ ceph -s
cluster:
id: dc883878-2675-4786-b000-ae9b68ab3098
health: HEALTH_OK
services:
mon: 3 daemons, quorum mon1,mon2,mon3 (age 3h)
mgr: mgr1(active, since 3h), standbys: mgr2
mds: 1/1 daemons up
osd: 12 osds: 12 up (since 3h), 12 in (since 3h)
rgw: 1 daemon active (1 hosts, 1 zones)
data:
volumes: 1/1 healthy
pools: 9 pools, 297 pgs
objects: 228 objects, 10 MiB
usage: 277 MiB used, 600 GiB / 600 GiB avail
pgs: 297 active+clean
io:
client: 2.7 KiB/s wr, 0 op/s rd, 0 op/s wr使用centos服务器挂载CephFs
10.0.0.17是我的mon地址
secret是我的client.admin的key
mount -t ceph 10.0.0.17:6789:/ /mnt -o name=admin,secret=AQDq+hdjGPjrCRAA2xLvyNb1T2GulPif4FXLrA==echo一个文件
echo "123" > 1.txt我用另外一台服务器直接挂在CephFS，可以发现已经有1.txt可以尝试修改文件，是实施更新的。
mount -t ceph 10.0.0.17:6789:/ /mnt -o name=admin,secret=AQDq+hdjGPjrCRAA2xLvyNb1T2GulPif4FXLrA==
标签：ceph,mgr1,deploy,Ceph,cephadmin,集群,active,CephFS,data From： https://www.cnblogs.com/zyyang1993/p/16665117.html